March Madness is the biggest thing in sports in the United States right now. A lot of fans are buying tickets online from re-sellers instead of going to "scalpers" on the street.
Sean Pate of stubhub.com says that he thinks scalpers will be entirely out of business in the next few years, because everyone is going to re-sell online.
But there is another big tournament going on right now that has a large online presence of its own: the 2007 Cricket World Cup. Lots of fans all over can't make it to the West Indies to see the games.
More and more, they are watching games on the Internet, according to Anupam Singh, vice-president of the Northern California Cricket Association.